Quantitative Analysis of Carbon-14 Labelled Polychlorinated Biphenyls and Hexachlorobenzene in Biological Samples Using an Oxidative Combustion Method

摘要

Carbon-14 labelled glucose, polychlorinated biphenyls, and hexachlorobenzene at concentrations of 0.01-1200 nanograms were oxidized in a combustion chamber at 900C. The14CO2emitted was trapped in an organic base. and its radioactivity measured. Recovery rates of 95-104 were obtained from samples oxidized with mannitol, while recoveries of samples oxidized with dried fish ranged from 93#x2014;101. This method provides an alternate technique of sample preparation for materials that may yield a highly quenched solution following conventional sample preparation procedures for liquid scintillation measurements.